I filed eletronically this year and got reject because some one else claimed my son already on their return.
Got:
F2441-526 - Form 2441, Child Care Expenses, Part II, Line 2(b),
each 'Qualifying Person SSN' provided must not be the same as a 'Qualifying Person SSN' in Part II,
Line 2 of Form 2441 in another accepted tax return for the same tax year.

My ex and I both use turbo tax, and have one child. Our divorce let's me claim my son, for odd years (2013) and her for even.

Can we both claim head of household, last year I thought I couldn't and filed as single?

What process do we need to go through to get it fixed, if it is wrong ?

Do I have to mail in a tax return, get flagged and both of us get audited?

We are on good terms, so working together not an issue, but I have already been using Dependent Care Account through out 2013, for daycare.